Centrifuge bucket



Feb. 26, '1935.' J. R. HILTNER GENTRIFUGE BUCKET Filed sept. 9, 193s Invento: .James P.Hi|tner`, by NW www I'Iis Attorney.

Patented Feb. 26, 1935 NlTED sTTl-:s

lem

CENTRIFUGE BUCKET James R. Hiltner, N

New York General Electric Com t, M388., .1 ci; zul t@ l. any, a corporation of Application september o, icssgsegni No. csic The present invention relates to centrifuge buckets such as are used in the manufacture oi rayon, for example.

The object of my invention is to provide an iind proved centrifuge bucket which is highly resistant to centrifugal stress so that it is capable oi operating at high speed, which is resistant to acid, and which is capable of being manufactured at low cost. l l

For a consideration of what I believe to be novel and my invention, attention is directed to the accompanying description and the claims ap pended thereto.

in the drawing, Fig. l is a side elevation, partly in section, of a centrifuge bucket embodying my invention, and Fig; 2 is a sar view of mocation.

r" to the drawing, l indicates the body of the centrifuge bucket and 2 indicates the hub. The body comprises e. shell 3 made of suitable metal such as steel or alum. llt may be made by die casting, for example. in metal M f 3 are a plurality of rows or rings of spaced holes d oi a size larger than the holes required for the escape of acid when the bucket is, used for spinning rayon. Shell 3 is reinforced by one or more layers of steel wire 5. For this purpose l may use piano wire of suitable diameter. The steel wire is wound on the shell in groups between the rows ci holes d whereby there is provided a group of turns of reinforcing wire in each space between the rows or holes. The groups or turns may be independent of each other or the groups oi turns may be formed of one continuous wire, the wire extending downwardly from one group to another between opegs d. The turns are wound on the shell under suicient tension to strongly reinforce the shell and they are preferably united to the shell and to each. other by fused metal. For example, the turns maybe soldered to the shell and to each other. There is thus provided a metal shell which is reinforced by steel wire, the wire in turn being united to and forming in substanceA an integral part of the shell. .'I'here is thus provided a metal shell which is strong but which at the same time is relatively light in weight.

On the shell and wire, both inside and outside, is a covering 'Z of' non-metallic material which is hard and acid resisting and which adheres to metal and also to a material comprising spinnable textile fibres united by an articial resin, such as a phenolic condensation product. Preferably, I use hard rubber but I may use other materials such as for example a suitable baking varnish or enamel. In the present-instance, in the drawing I have indicated hard rubber. The hard rubber extends through openings i in the shell so that theedges of the openings are covered by the rubber. 0n the rubber covering ,'7 is a covering 5 3 comprising spable textile bres, preferably a number of layers or cloth, united by an artificial resin, such as a phenolic condensation product. Covering 'je adheres -to covering 'l and thus through it is united to the metal shell 3. This serves to give a smooth, hard, acid resisting huish to both the inside d outside of the body i. riding throughthe are holes 9 which are located at thecenters ol holes d in metal shell 3. ereyare thus; provided holes 9 which are ma entirely-inthe non-metallic aterial of the buclret.

llhe hub oi the bucket comprises a metal sleeve lo formedzintegral with shell 3, a covering ll comprising material similar to the material of covering 7, for ereple, hard rubber, on its outer surface and a covering l2 of table textile nbres, probably layers of cloth, united by an articial resin-such as a phenolic condensation product. By this arrangement, the metal sleeve io a liner for the hub. i

ln an' the bucket, the coverings "l and il and the coves t and i2 are applied or molded directly on the metal shell. The methods for applying or molding materiels of this type are lmown and need not be described in this speciIn cation. suitable method or methods may be used.

Ii found desirable, the reinforcing wire for the shell may be omitted, in which case the shell itself may be made of material somewhat heavier than y would otherwise be the case. Such a construction is shown in Fig. 2 wherein 15 indicates me metal shell, 16 the non-metallic covering, such as the hard rubber covering, and 17 the covering comprising textile material united by an articial resin.

By my invention, I provide a centrifuge bucket which is unusually strong and which is acid reslsting, the metal being entirely covered by acid resisting material. The non-metallic covering .'I serves as a means for protecting the metal and also as a means for uniting shell 3 to covering 8. And in turn, covering 8, being stronger than covering '1, serves to prevent covering "l from being thrown off by centrifugal force. Also, spinnable textile fibres united by an artificial resin, when molded, acquire a very smooth glsy finish, il; tliig most desirable in a rayon spinning What I claim as new and desire to secure by Letters Patent of the United States, is:

1. A centrifuge bucket comprising a metal frame, reinforcing wire wound on the outside of said frame, an outer covering of spinnable textile iibres united by an artificial resin, and a covering of non-metallic material between the metal frame and wires and the first named covering which serves to unite the first named covering to the metal frame and wire. 2. A centrifuge bucket comprising a metal frame having circumferentially extending rows of spaced holes therein, reinforcing wire wound on the outside of said frame between the rows of holes, a covering of hard non-metallic material over the frame and wire and extending through said holes, and a covering of spinnable textile fibres united by an artificial resin on said first named covering.

3. A v centrifuge bucket comprising a metal frame having circumferentially extending rows of spaced holes therein, reinforcing wire wound on the outside of said frame between the rows of holes, the turns of said wire being united to each other and to the frame by fused metal, a covering of hard rubber over the frame and wire and extending through said holes, and a covering of spinnable textile :libres united by an articial resin on said hard rubber, said coverings being provided with holes in line with but of smaller diameter than the holes in the metal frame.

4. A centrifuge bucket comprising a metal frame having circumferentially extending rows of spaced holes therein, reinforcing wire wound on the outside of said frame between the rows of holes, and a covering of hard non-metallic material over the frame and wire and extending through said holes, said covering being provided with holes in line with but of smaller diameter than the holes in the metal frame.

5. A centrifuge bucket comprising a :metal .frame having spaced holes therein, a. covering of non-metallic material over the frame and extending through said holes, and a covering of spinnable textile fibres united by an artificial resin on said mst-named covering, said coverings being provided with holes in line with but and a covering of non-metallic material over said frame and wires.

8. A centrifuge bucket comprising a metal frame, reinforcing wire wound on the outside of said frame, a covering of hard rubber over the frame and wires, and a covering of spinnable textile bres united by an articial resin on said hard rubber.

9. A centrifuge bucket comprising a body and a hub, said body comprising a metal frame having a covering of non-metallic material and of spinnable textile iibres united by an artificial resin, and said hub comprisingr a metal liner integral with said frame and provided on its outer surface with a covering of hard rubber and spinnable textile iibres united by an artificial resin.

10. A centrifuge bucket comprising a metal frame, an outer covering of spinnable textile bres united by an artificial resin, and a covering of non-metallic material between the metal frame and the first named covering which serves to unite the flrst named covering to the frame.

11. A centrifuge bucket comprising a metal frame, a covering of non-metallic material over the frame and integrally united thereto, and a Vcovering of spinnable textile fibres united by an 

